<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<input type="text" placeholder="请输入0-100之间的整数" id="i1">
<input type="button" value="猜一猜" onclick="f()">
<div> 结果: <span></span></div>

<script>
    //得到0-100随机数
    let x = parseInt(Math.random()*101);
    let count=0;
    function f() {
        count++;
        let i = document.querySelector("#i1");
        let s = document.querySelector("span");
        if (isNaN(i.value)){
            s.innerText="输入错误!"
            return ;
        }

        if (i.value > x) {
            s.innerText = "猜大了!";


        } else if (i.value < x) {
            s.innerText = "猜小了！";
        } else {
            s.innerText = "恭喜你第"+count+"次猜对了!";
            count=0;
            x = parseInt(Math.random()*101);

        }

    }


</script>
</body>
</html>